Provide appropriate reagents to carry out the following reactions. it

just need reagents no need for structures, you can fill in answers like below;

a) 1.

     2.

     3.

b) 1.

     2.

     3. 

c) 1.

     2.

part 2

Given the alkene product of a Wittig reaction below, draw the structures for 2 different phosphonium salts and 2 different carbonyl compounds that can be used as starting materials for the synthesis of this product.